alice, Finally patched sharkey on my instance to default to misskey rounding so it applies when you're not logged in too :3
The changes: https://git.joinsharkey.org/alicem/Sharkey/commit/54556688099135953f7f10321042b3c0514b5010, see https://transfem.social/notes/9mv4anh7iut5002j for details (also thanks to @Marie for the info ^^)